This work presents new anticorrosive coatings for the AZ31 magnesium alloy, based on hybrid sol–gel films doped with a corrosion inhibitor. The were prepared by copolymerization of 3-glycidoxypropyltrimethoxysilane and zirconium (IV) tetrapropoxide. 8-Hydroxyquinoline (8-HQ) was chosen as inhibitor to be incorporated into at two different stages synthesis, either before or after hydrolysis precursors. effectiveness 8-HQ suppression verified Scanning Vibrating Electrode Technique....

Progress in the field of biodegradable materials has been significantly accelerated recent years, driven by search for sustainable substitutes fossil-derived resources. This study investigates formulation films composed polyvinyl alcohol (PVA) and nanocellulose extracted from rice husk. The husk underwent alkaline treatment bleaching cellulose extraction, followed sulfuric acid hydrolysis to obtain nanocellulose. were characterized through Fourier Transform Infrared Spectroscopy (FTIR),...

The production and characteristics of a part produced from titanium hydride (TiH 2 ) powder using the injection moulding (PIM) method are described. Use hydrogen as temporary alloying element in alloys is an attractive approach to enhance processability including sintering, compacting, etc., also improve final mechanical properties. In this paper, properties presented, based mainly on uniaxial compression resistance sintering parts. PIM parts were formed three different temperatures verify...

Os índices de desperdício materiais na construção civil são elevados. A reciclagem resíduos (RCC) é uma forma reduzir o impacto ambiental. Com isso, propõe-se neste trabalho a adição um tipo RCC, caso tijolos cerâmica vermelha, composição solo-cimento. base nesses aspectos, teve como objetivo avaliar traço solo-cimento com resíduo verificando influência da nas propriedades mecânicas e físicas tamanho real. Todos os resultados foram comparados tijolo referência, isto é, sem resíduo. Neste...

The production of biodegradable films has been studied to be a substitute conventional plastics. use starch in are great interest and modification improves an increase the mechanical properties film. were evaluated by Dynamic Mechanical Analysis (DMA). aim this study is determine produced from native chemically modified potato starch. was extracted subjected chemical oxidation different concentrations active chlorine. prepared with glycerol as plasticizer, observed optical microscope...

Some cellular aluminium materials have been extensively developed and investigated in recent years. The potential for applying foams lightweight construction is mainly based on the stiffness impact absorption. Because of these characteristics, this work uniaxial compression resistance foam. foam was formed with three different compaction presses to verify influence density and, subsequently, crushing resistance.

Production of small and geometrically complex parts is a typical application powder injection molding (PIM) process. The production by PIM can produce final texture with high roughness. roughness an important factor the adhesion human cell on implant. This intrinsic facilitate bone - implant fixation, but it reduces corrosion resistance implants. A design temporary screw probe adapted to peculiarities this process was proposed use in implants as well electrochemical essays. study aims at...

Production of small and geometrically complex parts is a typical application powder injection molding (PIM) process. The production by PIM can produce final texture with high roughness. roughness an important factor the adhesion human cell on implant. This intrinsic facilitate bone - implant fixation, but it reduces corrosion resistance implants. A design temporary screw probe adapted to peculiarities this process was proposed use in implants as well electrochemical essays. study aims at...

Magnesium is one of the lightest metals and magnesium alloys have good strength to weight ratio making them very attractive for many particular applications [1]. The main drawback their high corrosion susceptibility. Improving protection by deposition thin hybrid films can expand areas relatively cheap alloys. This work aims at investigation new anticorrosion coating systems alloy AZ31B using sol-gel films. sol-gels were prepared copolymerization 3- glycidoxypropyltrimethoxysilane (GPTMS),...

Currently, electrochemical plating, conversion coatings, anodizing, deposition of thin films (organic, inorganic or hybrid), laser surface alloying, cladding and organic coatings are employed to improve properties such as hardness corrosion resistance. For example, the development new “smart” coating systems implies not only mechanical covering protected with a dense barrier but also provides active which can allow continued physical chemical protection, even after partial damage coating, by...

Positional welding is a common challenge in many manufacturing practices and the position can affect mechanical properties of welded joints during manual metal arc welding. This work uses tensile tests to investigate joints, aiming test hypothesis influence on strength, total displacement before rupture plastic rupture. was tested for three different coated electrodes (AWS E6010, AWS E6013 E7018) positions (1G, 3G 4G), accounting nine types specimens. For each type specimen, ten repetitions...

Cobalt based composites with tungsten carbide, titanium carbide and tantalum as a hard phase dispersed finely in the cobalt matrix by mechanical alloying process high energy ball mill have been investigated. These alloys consist 90 wt% liquid activator. Using sintering at nearby 1400 °C, relative densities of 99% achieved, providing best wear behavior properties this process. It is shown that milling time required for highest sintered density heavily dependent on conditions. The general...

The capacitive properties on aluminum alloy coated by sol-gel are evaluated in this work. samples were anodized a H 2 SO 4 solution for three different times (15, 20 and 30 min) subsequently covered sol-gel. capacitance of the was electrochemical impedance spectroscopy (EIS). Firstly anodizing evaluated. second condition evaluation better results obtained first observed blank 15 min samples. After deposition, influence coating overall observed. Their stability during immersion time as well.

In this study, the inhibitor effect of Solidago chilensis extract as green corrosion for anodized aluminum alloy samples was evaluated in NaCl 3%wt solution. This study carried out application on cans pack foods. The procedure surface treatment done by anodizing followed sealing a solution containing inhibitor. Essays potentiostatic polarization and electrochemical impedance spectroscopy were to evaluate effect. mechanical analyses performed influence thickness anodization resistance...

Currently, electrochemical plating, conversion coatings, anodizing, deposition of thin films (organic, inorganic or hybrid), laser surface alloying, cladding and organic coatings are employed to improve properties such as hardness corrosion resistance. For example, the development new “smart” coating systems implies not only mechanical covering protected with a dense barrier but also provides active which can allow continued physical chemical protection, even after partial damage coating, by...